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The world’s first “smart toothbrush” has been unveiled, a device that tells users if they have missed a spot while cleaning their teeth.

The Kobitree toothbrush is filled with sensors which will “tell you whether you have brushed long enough and reached the hard-to-reach but important parts of your teeth and gums”, its makers say.

The device can connect with your mobile phone through bluetooth, allowing people to keep track of their brushing habits using an app. However, this can also get dentists’ detailed information about the oral hygiene of their patients. It will go on sale for around £60